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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Jason Tests / PSK31 |
| From: | [email protected] |
| Date: | Sun, 27 Jan 2002 11:31:54 EST |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
|
Hello Jim and David,
I have modified the PSK31 core in Spectrum Lab a bit so it can now produce an on/off keyed "audio carrier" with a few kHz which only needs to be rectified to have the raw phase keying information. What I did not understand completely is how Jim produces the amplitude shaping. I think the PA supply voltage is variable, but where does the "envelope" signal come from ? One could (with a bit more programming work and more CPU power) deliver the "pulse shaping envelope" on the second channel of a stereo card. 73 Wolf DL4YHF. |
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